Week 3 Notes - WanderlustPenguin/Charles-Tech-Journal GitHub Wiki
Lectures
ARP(Address Resolution Protocol): layer 2 protocol that finds MAC addresses to send packets to talk to another system, including to the router/switch, only works within the switch on the LAN
ARP cache: ARP caches save the broadcast for a while, so you don't need to go through the ARP broadcast every time, works like a map
packets travel from MAC address to MAC address to reach their location
excessive FF:FFF are a broadcast
ARP ping?
IP addresses gave 32 bits
IP addresses have 4 sections consisting of 8 numbers separated by periods, called octets
255.225 means everything is on
similar IPs(all same numbers except the final number set) are in the same network